libs/test/doc/src/examples/example42.cpp

#define BOOST_TEST_MODULE example
#include <boost/test/included/unit_test.hpp>
#include <boost/test/floating_point_comparison.hpp>
//____________________________________________________________________________//
BOOST_AUTO_TEST_CASE( test )
{
double v1 = 1.23456e-10;
double v2 = 1.23457e-10;
BOOST_CHECK_CLOSE( v1, v2, 0.0001 );
// Absolute value of difference between these two values is 1e-15. They seems
// to be very close. But we want to checks that these values differ no more then 0.0001%
// of their value. And this test will fail at tolerance supplied.
}
//____________________________________________________________________________//